Siemens' Sentron PAC3100 power monitoring device records energy consumption and measures basic electrical values

The Sentron PAC3100 power monitoring device from the Siemens Division Industry Automation records energy consumption and measures basic electrical values such as current, voltage, power and frequency in low-voltage power distribution. The Sentron PAC3100 is the only device in its class with digital inputs and outputs and an integrated communications interface. Easy installation and commissioning make the entry-level Sentron PAC3100 well suited for digital measurements in industry, non-residential buildings and infrastructure. The monitoring device satisfies IEC61557-12, the new standard for power monitoring devices.

The Sentron PAC3100 seamlessly records the power and basic electrical values such as current, voltage, power and frequency in three- and four-wire networks. It can be directly connected in low-voltage systems up to a rated voltage of 277VL-N /480VL-L. Higher voltages are measured using voltage transformers. Two energy meters measure the active and reactive energy, which can be set for supply, output or balance respectively. The active energy is recorded with a measuring inaccuracy of less than 1%.

Removable terminals, a combined latching holder and an overall depth of 51 millimeters make it easy to install the compact device in 96x96 millimeter format. With its front in IP65 degree of protection, the product designed for panel mounting is also suitable for use in harsh environments.

The Sentron PAC3100 is parameterized directly on the unit with a few settings. This is done using four function keys and a large graphical liquid crystal display, which also shows the measured values. Plain text displays in eight selectable languages support intuitive operator prompting. An RS485 communications interface with open Modbus RTU protocol transfers the measured values. The power monitoring device has two digital inputs and two digital outputs as additional interfaces. The digital inputs with internal power supply can be used for status monitoring. They also allow relay contacts to be connected without their own power supply. The multi-functional digital outputs can be programmed as active or reactive energy pulses, or used as a switching output for telecontrol via Modbus RTU.

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